Brake-drum lining



May 26, 1925.

J. R. BARTHOLOMEW BRAKE DRUM LINING Filed April 1 ATTORNEY Patented May 26,1925.-

UNITED ..STATE'S PATENT OFFICE.

JOB-IN R. BAaTH'oLoMEw, or BERKELEY, CALIFORNIA. ASSIGNOR 'ro rnn'wnsrmo HOUSE AIR BRAKE ooMrANY, or WILMERDING, I'ENNsYLvANIA, A convolut-v [PICK OF PENNSYLVANIA.

nnakn naumf mime,

Application med-e in- 1a,-192s." sel-iaino; 631,839.

7 '0 all whom it may concern:

Be it known that I, J OHN at Berkeley, in the 'county of Alameda and 6 State of Qalifornia,'have invented new and useful Im rovements in Brake-Drum Linrings, of w ich the following is a specification. I 1

This invention relates to brakes of the 10 automotive type in which expansible brake shoes are adapted to frictionally engage the interior friction face of a brake drum.

It has heretofore been proposed to provide a removable linin for the brake drum, against which the bra e shoes are adapted tov engage, so thatthe lining will take the i' wear and after the same has become sufficiently'worn, the worn lining may be .re-

moved and a new lining replaced.

The principal object of my invention is to provide an improved removable brake R. Blurrnopog anew, a citizen of the United States, IQSldlIlg provided at diametrically opposite points with apertured bosses 4 for rece ving; $80111? ingv bolts 5. The bolts 5 are provided -with conical heads 6' adapted to engage cone shaped recesses in the brake lining 2, one recess preferably straddling the open joint 3, so that when the bolt 5 'isscrewed'home, I the meeting ends of the brake lining will be clamped firinly in ositionp I The conical hea s 6 of the bolts 5. ensure that the lining 2 will continue to, be held in place as the lining wears down and when a worn lining isto be replaced by a new one, it is merely necessary to remove the bolts '5,when'the lining 2 may be slipped'out bya lateral movement thereof withbut dis; mantling orotherwise disturbing the brake mechanism for that urpose.

Having now descrl ed my invention, what 50,

I claim asnew and desire to secure by Lety ters Patent, is '1 The combination with a brake drum, of a split one-piece brake lining mounted in said drum and having acetic-shaped recess strad} dling the joint in the lining and a bolt hav ing a cone-shaped head engaging said recess for securing said lining to the drumc In testimony whereof I have hereunto set. my-hand.-

JOHN R. BARTHOLOMEW, 

